BMW SA640, Installation Instruction, Page: 31 / 33

4 Circuit diagram
Fold out folded page 9.
A4* Switch module
A49 Fuse strip IV
B400 Microphone
H41/H44 Driver's door speaker
N9 Radio
U407 Base interface
X1* 2-pin plug connector on switch module (on cars with an on-board monitor, the adapter
cable for switch module IV is also connected)
X322 12-pin plug connector in the boot, left-hand side
X325 4-pin plug connector in the boot, right-hand side
X400 12-pin plug connector for telephone
X1108/X10012 Ground post cable eyelet for switch module in footwell on the driver's side
X1765 3-pin socket casing for cable compensator
X2759 3-pin plug connector for microphone
X4038 54-pin socket casing for base interface
X4039 18-pin socket casing for eject box
X13075 Cable eyelet on ground post at right-hand C pillar
X18126 17-pin socket casing for radio
X18196/X18198 8-pin plug connector for door plug on the driver's side
X10018 Fuse strip IV, A49, in the boot, right-hand side
1) Coding loop (cable colour blue): for cars with a BMW Professional DSP hi-fi system and navigation system
2) Coding loop (cable colour white): for cars with a navigation system
3) 3-pin plug casing for navigation system (special accessory)
4) To radio or hi-fi system
5) The plug connector is to be cut and connected to the telephone wiring harness.
The components marked * and X designations are only applicable for this circuit diagram. All other components
and X designations comply with the BMW After-Sales circuit diagrams.
Cable colours:
bl = blue
br = brown
ge = yellow
gn = green
gr = grey
or = orange
rt
= red
sw = black
vi
= violet
ws = white
4-2/EN